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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.7 $ -->
<refentry id="function.oci-new-connect">
<refnamediv>
<refname>oci_new_connect</refname>
<refpurpose>Establishes a new connection to the Oracle server</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>resource</type><methodname>oci_new_connect</methodname>
<methodparam><type>string</type><parameter>username</parameter></methodparam>
<methodparam><type>string</type><parameter>password</parameter></methodparam>
<methodparam choice="opt"><type>string</type><parameter>db</parameter></methodparam>
<methodparam choice="opt"><type>string</type><parameter>charset</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>session_mode</parameter></methodparam>
</methodsynopsis>
<para>
<function>oci_new_connect</function> establishes a new connection to
an Oracle server and logs on. Unlike <function>oci_connect</function> and
<function>oci_pconnect</function>, <function>oci_new_connect</function>
does not cache connections and will always return a brand-new freshly
opened connection handle. This is useful if your application needs
transactional isolation between two sets of queries.
</para>
<para>
The optional third parameter can either contain the name
of the local Oracle instance or the name of the entry in
<filename>tnsnames.ora</filename>. If the third parameter is not specified,
PHP uses environment variables <literal>ORACLE_SID</literal> and
<literal>TWO_TASK</literal> to determine the name of local Oracle
instance and location of <filename>tnsnames.ora</filename> accordingly.
</para>
<para>
Parameter <parameter>session_mode</parameter> is available since version
1.1 and accepts the following values: <constant>OCI_DEFAULT</constant>,
<constant>OCI_SYSOPER</constant> and <constant>OCI_SYSDBA</constant>.
If either <constant>OCI_SYSOPER</constant> or
<constant>OCI_SYSDBA</constant> were specified,
<function>oci_new_connect</function> will try to establish privileged
connection using external credentials. Privileged connections are
disabled by default. To enable them you need to set <link
linkend="ini.oci8.privileged_connect">oci8.privileged_connect</link>
to On.
</para>
<note>
<simpara>
If you're using PHP with Oracle Instant Client, you can use easy connect
naming method described here:
<ulink url="&url.oracle.oic.connect;">&url.oracle.oic.connect;</ulink>.
Basically this means you can specify "//db_host[:port]/database_name"
as database name. But if you want to use the old way of naming you
<emphasis>must</emphasis> set either <constant>ORACLE_HOME</constant> or
<constant>TNS_ADMIN</constant>.
</simpara>
</note>
&oci.charset;
<para>
The following demonstrates how you can separate connections.
<example>
<title><function>oci_new_connect</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
echo "<html><pre>";
$db = "";
$c1 = oci_connect("scott", "tiger", $db);
$c2 = oci_new_connect("scott", "tiger", $db);
function create_table($conn)
{
$stmt = oci_parse($conn, "create table scott.hallo (test
varchar2(64))");
oci_execute($stmt);
echo $conn . " created table\n\n";
}
function drop_table($conn)
{
$stmt = oci_parse($conn, "drop table scott.hallo");
oci_execute($stmt);
echo $conn . " dropped table\n\n";
}
function insert_data($conn)
{
$stmt = oci_parse($conn, "insert into scott.hallo
values('$conn' || ' ' || to_char(sysdate,'DD-MON-YY HH24:MI:SS'))");
oci_execute($stmt, OCI_DEFAULT);
echo $conn . " inserted hallo\n\n";
}
function delete_data($conn)
{
$stmt = oci_parse($conn, "delete from scott.hallo");
oci_execute($stmt, OCI_DEFAULT);
echo $conn . " deleted hallo\n\n";
}
function commit($conn)
{
oci_commit($conn);
echo $conn . " committed\n\n";
}
function rollback($conn)
{
oci_rollback($conn);
echo $conn . " rollback\n\n";
}
function select_data($conn)
{
$stmt = oci_parse($conn, "select * from scott.hallo");
oci_execute($stmt, OCI_DEFAULT);
echo $conn . "----selecting\n\n";
while (oci_fetch($stmt)) {
echo $conn . " <" . oci_result($stmt, "TEST") . ">\n\n";
}
echo $conn . "----done\n\n";
}
create_table($c1);
insert_data($c1);
select_data($c1);
select_data($c2);
rollback($c1);
select_data($c1);
select_data($c2);
insert_data($c2);
commit($c2);
select_data($c1);
delete_data($c1);
select_data($c1);
select_data($c2);
commit($c1);
select_data($c1);
select_data($c2);
drop_table($c1);
echo "</pre></html>";
?>
]]>
</programlisting>
</example>
</para>
<para>
<function>oci_new_connect</function> returns &false; on error.
</para>
<note>
<para>
In PHP versions before 5.0.0 you must use <function>ocinlogon</function> instead.
This name still can be used, it was left as alias of
<function>oci_new_connect</function> for downwards compatability.
This, however, is deprecated and not recommended.
</para>
</note>
<simpara>
See also <function>oci_connect</function> and
<function>oci_pconnect</function>.
</simpara>
</refsect1>
</refentry>
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-->
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